Improved rock-drill



NrrED STATES PATENT OFFICE.

WILLIAM Z. IIATGHER AND VILLIAM L. LANGE, OF PLYMOUTH, PA.

IMPROVED ROCK-DRILL.

To all whom it may concern: K

Be it known that we, WILLIAM Z. HA'roHER and WILLIAM L. LANCE, of Plymouth, county ofLuzerne, State of Pennsylvania, have invented an Improved Coal or Roel; Drill, of which the following is a specilication.

Our invention consists in certain improvements, fully described hereinafter, in coal and rock drilling machines, the improvements being such that the machine, which is intended principally as a coal-getter,7 can be conveniently moved from point to point, adjusted to any angle, and rmly secured after adjustment, so that the blows of the drill-rod, which are dealt with the greatest rapidity, shall be most effective.

In the accompanying dmtwings, Figure l is a side View of our coal or rock drilling machine; Fig. 2, atransverse vertical section on the line l 2, Fig. l, Fig. 3, a plan view; Figs. 4 and 5, views of the drilling-tool, and Figs. 6 and 7, views ofthe mechanism for turning the drillrod.

A is a frame supported, in the present instance, on three legs, a, two at the rear and one in the front, the legs being pointed at thelower end, to insure sta-bility, by slightly indenting the coal or rock.

To the frame A is secured the yoke-like stand B, and in this stand the opposite trunnions, b b, `ofthe adjustable guide-frame D have theirbearin gs. A perforated segmental bar, d, is hinged at its upper end to the guide-fraaie D, near the rear end of the saine, and passes between lugs on the frame A, to which the segm entis secured, after adjustment, by a pin passing through the lugs and through one or other of the holes in the segment, or the latter may be secured in the frame A by any other appropriate fastenings.

Through a block, e, so secured to the frame D as to bereadily turned thereon, passes a tubular rod, F, the lower end of which ispovinted, as shown, the upper end being provided with a screw, f, having a suitable hand-wheel, h, and above the latter a pointed projection,i.

It maybe here remarked that although the machine maybe employed for quarrying and tunneling purposes generally, it has been more especially designed as a coal -getting machine, the object of the perforated segment being to secure the guide-framo D to the frame A after the latter has been adjusted to the angle determined by the desired course ofthe drill.

The object of the rod F is to steady the front of the guide-frame D, the lower pointed end penetrating the coal at the bottom of the drift, and the pointed projection t' ofthe screw j being caused to bear againstthe top of the drift. The swivel-block e permits such an adjustment ofthe rod F as the nature of the eX- cavation and the angle of the frame D may suggest, the rod being permanently secured to the block hy a set-screw, or otherwise, after adjustment- As a further steadiment, the stand B is provided at the top with a screw, j, a pointed projection of which is caused to bear against the roof ofthe drift, thus binding the frame A with its legs iirmly to the ground.

The plate E is controlled by a screw, II, which turns in projections at the opposite ends of the adjustable frame D, the screw being adapted to adivided nut, so controlled by an arm, 7:, that on moving the latter in one directionthe nut will be out of gear with and uncontrolled by the screw, and on moving the arm in the opposite direction the nut will be adapted to the threads of the screw and under the control of the same.

rlheslidingframe E carries a steam-cylinder, G, having theusual valves and other appliances common to steam-engines.

In the present instance.the'piston-rod Zis connected to a cross-head, m, arrange-d to slide in guides, one end of the cross-head being connected to the crank or iiy wheel of a shaft, p, from which the valves are operated, the said wheel insuring the uniform action ofthe engine and preventing the sudden jolts or stoppage of the engine, which is otherwise apt to occur when the drill is directly connected to and operated by the piston-rod.

The drill-rod I is tubular, and is perforated at frequent intervals, so as to be self-cleaning of the detritus which gains access to the interior darin g the process of drilling. The drillrod passes between and is guided by rollers 1 1, turning in a projection, t, on the front end of the frame I). The drilling-tool,which has to be screwed into or otherwise attached to the end of the rod Lis of the peculiar form illustrated in Fig. 4. The cutting-edge from x to y, Fig. 5,

is straight, and coincides with a radial line struck from the center ofthe drill-rod; but from y to the point u the cutting-edge is curved in the two directions shown in the drawings. It has been ascertained by repeated tests that a cutting-edge of this form is most effective on coal, providing the drill he turned in the direction of the arrow, Fig. 5.4 j

The mechanism for turning the drill-rod will be best understood by reference to Figs. 6 and 7.

To the rod, near the point where it is connected to the piston-rod, is secured a cog-wheel, J, each tooth of which is reduced at both ends to nearly a sharp point.

On a plate, K, secured to the guideframe D, is apermanent rib, L, at the rear end ot' which is hinged a tapering arm, M, a similar arm, N, being hinged to the plate K. When the two arms have been so moved as to be in contact with each other they form a continuation of the rib L, which is of proper thicknesss to fit freely between the teeth of the wheel J. When the. wheel carried by the drill-rod is moved in the direction ofthe arrow 2, Fig. 7, the pointed end of one of its teeth, V, will pass between the arms M and N, the outward movement of the latter being limited by a stop, and the former, which is acted on by a spring, yielding sufficiently to permit the tooth to pass. As the drill-rod approaches the limit of its rearward movement the wheel J is turned by the con-A tact of one of its teeth with the inclined plane presented by the tapering arm N. i After the tooth has passed the point of the arm M the latter is forced by the spring against the arm N, so that on the forward movement of the drill-rod the tooth which passed between the arms will return on the outside ofthe arm M. The latter and the arm N being thus between two teeth form together a guide for the wheel, which preserves,with the drill-rod, a direct forward course without turning, the permanent rib L being between two teeth and affording a rigid preventive of any turning of the tool at the time the blow is struck.

It will now'be seen that as the drill-rod reas the drill-rod reciprocates it is graduallymoved forward with the slide E andengine by means of the screw H. When a hole of the desired depth has been bored the slide Eris,

by moving the arm k, placed beyond the control of the screw, and can,with the engine and drill-rod, be moved back rapidly, preparatory to commencing the boring of another hole.

We do not desire to confine ourselves to the precise mode described of constructing the machine in all its details.

We claim- 1. The rod F adjustable on the frame D, and having at the end an adjustable rod, fi, substantially as specified.

2. rlhe combination of the adjustable rod F with the swivel-block e, as set forth.

3. The arrangement of the frame A, yoke B, set-screwj, and frame D, h ung within the yoke; as specified.

points x y, is straight and is curved in two directions between the points y and u, substantially as described.

5. The drill-rod Wheel with teeth having pointed ends,.in combination with the perinanent rib L and yielding arms M and N.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

VILLIAM Z. HATGHER.

VILLIAM L. LANCE.

Vitnesses JOHN WHITE, HARRY SMITH.

4.. The drin, the edge of wiiieinbetween the 

